Rhodia Chimie

Bluestar Silicones France

Bluestar Silicones France Sas

Didier Dhaler

Jean-Marc Frances

Christian Mirou

Christophe Guyot

Laurent Dumont

Francis Lafaysse

André Lievre

John White

Jean-Paul Benayoun

Pierre Luciani

Jacques Kieffer

Andr&eacute; Lievre

The invention relates to dental compositions which can be used to produce dental prostheses and for dental restoration. The inventive compositions comprise: (1) a concentrated silica solution comprising colloidal amorphous silica particles in at least one continuous silicon phase, consisting of polymerisable and/or crosslinkable silicon polymer and/or oligomer; (2) at least one photosensitiser; and (3) a cationic initiator which is selected from among those comprising a cationic entity selected from onium salts having formula (1): [(R)n-A-(R)m]

Dental composition based on a colloidal silica solution in a continuous silicon phase

The invention relates to crosslinkable or crosslinked silicone compositions capable of being used to form a water-repellent and release coating for a flexible support made of paper or of polymer, in particular a heat-sensitive flexible support. These compositions are of the type of those comprising crosslinking polyorganosiloxanes carrying SiH units and unsaturated, preferably vinylated, polyorganosiloxanes capable of reacting with the crosslinking agent by polyaddition in the presence of platinum to form the release crosslinked coating on the flexible support. The targeted aim is to make possible the instantaneous crosslinking at low temperature (85-90&#xb0; C.) of such silicone compositions coated on flexible supports at a very high speed. To achieve this aim, the invention provides for the use of specific crosslinking agents composed of POSs hydrogenated at the chain end and in the chain. The invention also relates to the silicone compositions of solvent-free type or of emulsion type comprising the Si-Vi POS, the SiH POS crosslinking agent &#x3b1;,&#x3c9;-bis(hydrodimethylsiloxyl)poly(hydromethyl)-(dimethyl)siloxane, and the platinum catalyst, inter alia. Applications: release silicone coatings obtained by crosslinking/polyaddition for heat-sensitive flexible supports, for example polymeric films made of polyethylene.

Crosslinking agent for a silicone composition which can be crosslinked at low temperature based on a hydrogenated silicone oil comprising Si-H units at the chain end and in the chain

Silicone compositions particularly useful for the production of anti-fouling varnishes for application to support substrates, these providing an anti-fouling varnish for textiles covered with silicone elastomers which is economical, adhesive, non-slip and glossy; the subject varnishes comprise a crosslinkable silicone composition containing, per 100 parts by weight: 1, at least 80 parts by weight of: (1.1), 2., 0.1 to 10 parts of weight of: (1.2), 3., 0 to 10 parts by weight of at least one polydimethylisiloxane (PDMS) acrylate or epoxide, 4., 0 to 10 parts by weight of at least one silylated compound which includes at least one ultrafine filler, 7., 0 to 10 parts by weight of at least one thickener, and 8., 0 to 10 parts by weigh of at least one additional functional additive.

Anti-fouling cationically crosslinkable varnish compositions and support substrates coated therewith

The invention concerns crosslinkable silicone compositions, useful for forming water-repellent and release coating for flexible heat-sensitive support. Said compositions comprise crosslinking polyorganosiloxanes (POS) bearing &#x2261;Si&#x2014;H units and unsaturated POS, for example &#x2261;Si-Vi vinyl-containing POS, capable of reacting with the crosslinking agent by polyaddition, in the presence of platinum to form a release crosslinked coat on the flexible support. The invention aims at instantaneously enabling low platinum content crosslinking of such silicone compositions, coated at high speed. Therefor, the invention provides for the use of particular crosslinking agents consisting of hydrogenated POS comprising at least three hydrogen atoms bound to the silicon located at chain end and in the chain. The invention also concerns solvent-free or emulsion-type silicone compositions comprising the &#x2261;Si-Vi POS (I.1), the crosslinking agent &#x2261;Sl-H POS (l.2) and the platinum catalyst among others. The invention is useful for coating flexible supports, for example made of Liss&#xe9; BEKK&#x3e;1000 paper.

Crosslinking agent for a crosslinkable silicone composition with a low level of platinum based on a hydrogenated silicone oil comprising Si-H units at the chain end and in the chain

The invention concerns a silicone/adhesive complex comprising at least a silicone coating applied on a first support and an adhesive coating applied on a second support, and whereof the release force of a silicone/adhesive interface is capable of being modulated. The invention is characterized in that its silicone coating results from heat polymerization and/or curing of: either monomers, oligomers and/or polymers bearing at least a reactive Si&#x2014;H structural unit and monomers, oligomers and/or polymers bearing at least a reactive unsaturated aliphatic group; or monomers, oligomers and/or polymers bearing at least a reactive Si&#x2014;OH structural unit; or monomers, oligomers and/or polymers bearing at least a reactive Si&#x2014;H structural unit and monomers oligomers and/or polymers bearing at least a reactive epoxy, oxetane and/or dioxolane unit; and said silicone coating further comprises at least an additive adjusting the release force of a silicone/adhesive interface and whereof the activity is photochemically initiated and adjustable.

Heat-curable silicone adhesive complex whereof the interface has release force capable of being modulated

The invention concerns a silicone/adhesive complex including at least one silicone coating applied on a first support and an adhesive coating applied on a second support, wherein the release force of a silicone/adhesive interface is capable of being modulated. The invention is characterized in that its silicone coating results from polymerization and/or curing by cationic process of polyorganosiloxane monomers, oligomers and/or polymers bearing as reactive groups at least epoxy, oxetane, dioxolane and/or alkenylether functions and the silicone coating further includes at least an additive regulating the release force of a silicone/adhesive interface and whereof the activity is photochemically initiated and adjustable.

Carbon-curable silicone/adhesive complex whereof the interface has release force capable of being modulated

The invention concerns a silicone/adhesive complex comprising at least a silicone coating applied on a first support and an adhesive coating applied on a second support and whereof the release force of a silicone/adhesive interface is capable of being modulated. The invention is characterised in that its silicone coating is derived from polymerisation and/or crosslinking of polyorganosiloxane monomers, oligomers and/or polymers and said silicone coating further comprises at least an additive regulating the release force of a silicone/adhesive interface and whereof the activity is initiated and capable of being modulated by electron beam irradiation.

Growing community of inventors

Tassin, France

Didier Dhaler